Avocado Tuna Melt Recipe

Name: Avocado Tuna Melt Recipe
Prep time: 10 min
Cook time: 20 min
Total time: 30 min
Cuisine: American
Ingredients: 3 (5 oz.) cans albacore tuna in water, drained; 1 large ripe avocado, pitted; 1 Tbsp. red onion, finely chopped; 1-2 Tbsp. fresh parsley, finely chopped; 2 Tbsp. mayonnaise; 1 Tbsp. Dijon mustard; 2 Tbsp. fresh lemon juice; 6-8 slices crusty bakery style whole-grain bread; 1-2 medium tomatoes, sliced; 1 cup mild cheddar cheese, freshly grated; Kosher salt and black pepper, to taste